Finding the Fourth Proportional to 2,158.38, 3,214.89 and 2,147.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.38 : 3,214.89 = 2,147.58 : x
2. Step 2: Convert to fraction form
   2,158.38/3,214.89 = 2,147.58/x
3. Step 3: Cross multiply
   2,158.38x = 3,214.89 × 2,147.58
4. Step 4: Simplify right side
   2,158.38x = 6,904,233.47
5. Step 5: Solve for x
   x = 6,904,233.47/2,158.38
6. Step 6: Final answer
   x = 3,198.80